The PANDA Experiment

Transcription

1 High Precision Hadron Physics at FIR Lars chmitt GI, armstadt First FIR FEE Workshop, October 2005

2 Outline 1 PN Overview Introduction Physics Program 2 Overview Highlights PN Q and Trigger

3 PN Overview Introduction PN anti-proton Nnihilations at rmstadt New experiment at FIR torage ring HER for antiprotons at GeV/c Physics topics: harmonium spectroscopy earch for exotic hadrons in the charm sector harm mesons in nuclear matter Open charm physics Hypernuclei

4 PN Overview Introduction PN anti-proton Nnihilations at rmstadt New experiment at FIR torage ring HER for antiprotons at GeV/c Physics topics: harmonium spectroscopy earch for exotic hadrons in the charm sector harm mesons in nuclear matter Open charm physics Hypernuclei

5 PN Overview Introduction PN anti-proton Nnihilations at rmstadt New experiment at FIR torage ring HER for antiprotons at GeV/c Physics topics: harmonium spectroscopy earch for exotic hadrons in the charm sector harm mesons in nuclear matter Open charm physics Hypernuclei

6 PN Overview Introduction PN anti-proton Nnihilations at rmstadt New experiment at FIR torage ring HER for antiprotons at GeV/c Physics topics: harmonium spectroscopy earch for exotic hadrons in the charm sector harm mesons in nuclear matter Open charm physics Hypernuclei

7 PN Overview Physics Program pectroscopy pectroscopy with antiprotons p p machine allows E 100 kev vs. E 10 MeV in e + e obtain m and Γ with high precision e + e produces only J P = 1 (γ) p p accesses all states harm spectroscopy harmonium system The Positronium of Q harm hybrids c c-states narrow, understood Little interference between c cg and c c-states Mass GeV, c cg narrow, σ( pp c c) harm meson spectroscopy Mass [GeV/c 2 ] LER 2 1 Mesons and Exotics Bottom Mesons B, B s harmonium J/Ψ, χ, Ψ(2) harmed Mesons, s Light Mesons π,η,ω,φ, ρ,f,a,h,k qq Mesons gg ggg ccg ssg ddg uug ccqq qqqq Predicted "Exotics" Ξ c Ξ c Σ c Σ c Λ c Λ c Ω s Ω s Ξ s Ξ s Σ s Σ s Λ s Λ s Two-Body Thresholds p Momentum [GeV/c] at rest

8 PN Overview Physics Program pectroscopy pectroscopy with antiprotons p p machine allows E 100 kev vs. E 10 MeV in e + e obtain m and Γ with high precision e + e produces only J P = 1 (γ) p p accesses all states harm spectroscopy harmonium system The Positronium of Q harm hybrids c c-states narrow, understood Little interference between c cg and c c-states Mass GeV, c cg narrow, σ( pp c c) harm meson spectroscopy Mass [GeV/c 2 ] LER 2 1 Mesons and Exotics Bottom Mesons B, B s harmonium J/Ψ, χ, Ψ(2) harmed Mesons, s Light Mesons π,η,ω,φ, ρ,f,a,h,k qq Mesons gg ggg ccg ssg ddg uug ccqq qqqq Predicted "Exotics" Ξ c Ξ c Σ c Σ c Λ c Λ c Ω s Ω s Ξ s Ξ s Σ s Σ s Λ s Λ s Two-Body Thresholds p Momentum [GeV/c] at rest

9 PN Overview Physics Program Nuclear Matter harm in the Medium Mesons in nuclear matter Masses change in nuclei -mass lower Enhanced charmonium states due to lower threshold J/Ψ absorption in nuclei Hypernuclei 3rd dimension in nuclear chart tudy interactions of nucleons in the nuclear potential PN: ouble Hypernuclei ΛΛ interaction in nucleus p

10 PN Overview Physics Program Nuclear Matter harm in the Medium Mesons in nuclear matter Masses change in nuclei -mass lower Enhanced charmonium states due to lower threshold J/Ψ absorption in nuclei Hypernuclei 3rd dimension in nuclear chart tudy interactions of nucleons in the nuclear potential PN: ouble Hypernuclei ΛΛ interaction in nucleus p

11 Overview Overview ntiproton Beam Momentum GeV/c ooled p: δp/p /s production, stored

12 Overview Overview ntiproton Beam Momentum GeV/c ooled p: δp/p /s production, stored Internal Targets Luminosity cm 2 s 1 Proton targets: pellets, cluster jet Nuclear targets: wires, foils

13 Overview Overview Target pectrometer: olenoid Tracking: MV, TT or TP PI: IR, TOF, muon chambers EM: PbWO crystals

14 Overview Overview Target pectrometer: olenoid Tracking: MV, TT or TP PI: IR, TOF, muon chambers EM: PbWO crystals Forward pectrometer: ipole Tracking: M Gas RIH, TOF, muon chambers hashlyk calorimeter

15 Highlights Tracking Micro Vertex etector TL/M type hybrid silicon pixels Barrel + forward disks 5 M pixels k strips 5 layers

16 Highlights Tracking Micro Vertex etector TL/M type hybrid silicon pixels Barrel + forward disks 5 M pixels k strips 5 layers Time Projection hamber 1.2 m length, NeO 2 mixture ontinuous readout via GEM and 100k pads (2 2 mm 2 ) PI via de/dx

17 Highlights PI and alorimetry IR etector Quartz radiator rods Internal reflection of 2 readout: (x,y) or (φ,t)

18 Highlights PI and alorimetry IR etector Quartz radiator rods Internal reflection of 2 readout: (x,y) or (φ,t) Electromagnetic alorimeter PbWO crystals E 1.6%/ E Temperature (25 ± 0.1)

19 PN Q and Trigger Requirements Physics Requirements Rare events, tiny cross sections, small deviations High precision High interaction rate Very high data rates Basic Rate Requirements 10 MHz interaction rate Raw rates 200 GB/s ata logging 200 MB/s mall event size 8 kb Functional Requirements Wide physics range high flexibility Parallel measurements High selectivity

20 PN Q and Trigger Requirements Physics Requirements Rare events, tiny cross sections, small deviations High precision High interaction rate Very high data rates Basic Rate Requirements 10 MHz interaction rate Raw rates 200 GB/s ata logging 200 MB/s mall event size 8 kb Functional Requirements Wide physics range high flexibility Parallel measurements High selectivity

21 PN Q and Trigger Requirements Physics Requirements Rare events, tiny cross sections, small deviations High precision High interaction rate Very high data rates Basic Rate Requirements 10 MHz interaction rate Raw rates 200 GB/s ata logging 200 MB/s mall event size 8 kb Functional Requirements Wide physics range high flexibility Parallel measurements High selectivity

22 PN Q and Trigger ampling Readout ontinuous ampling ll channels are digitized continuously, free running, unbiased readout Each detector can contribute to event selection No dedicated trigger detector Technical Implications Massive data reduction as early as possible Flexible selection by programmable nodes Very high bandwidth ata Reduction: onvert digital hits to physical coordinates Noise reduction, zero suppression ignal time determination lusterisation and coordinate evaluation Pattern recognition (rings, tracklets,...)

23 PN Q and Trigger ampling Readout ontinuous ampling ll channels are digitized continuously, free running, unbiased readout Each detector can contribute to event selection No dedicated trigger detector Technical Implications Massive data reduction as early as possible Flexible selection by programmable nodes Very high bandwidth ata Reduction: onvert digital hits to physical coordinates Noise reduction, zero suppression ignal time determination lusterisation and coordinate evaluation Pattern recognition (rings, tracklets,...)

24 PN Q and Trigger ampling Readout ontinuous ampling ll channels are digitized continuously, free running, unbiased readout Each detector can contribute to event selection No dedicated trigger detector Technical Implications Massive data reduction as early as possible Flexible selection by programmable nodes Very high bandwidth ata Reduction: onvert digital hits to physical coordinates Noise reduction, zero suppression ignal time determination lusterisation and coordinate evaluation Pattern recognition (rings, tracklets,...)

25 PN Q and Trigger rchitecture omponents Time distribution Intelligent frontends Powerful compute nodes onfigurable high speed network ata flow ata reduction First selection at high rate Further selections at lower rates, but with more detectors ata logging after online reconstruction Time istribution oncentrators/ s L1 Network Feature Extraction L2 Network Event election lock Generic lock istribution erial Links ompute Nodes Broadcasts ompute Nodes Broadcasts ompute Nodes Broadcasts Encoder onfigurable High peed Network High peed Network Event elector Farm Mass torage

26 PN Q and Trigger rchitecture omponents Time distribution Intelligent frontends Powerful compute nodes onfigurable high speed network ata flow ata reduction First selection at high rate Further selections at lower rates, but with more detectors ata logging after online reconstruction Time istribution oncentrators/ s L1 Network Feature Extraction L2 Network Event election lock Generic lock istribution erial Links ompute Nodes Broadcasts ompute Nodes Broadcasts ompute Nodes Broadcasts Encoder onfigurable High peed Network High peed Network Event elector Farm Mass torage

27 PN Q and Trigger ampling and election Reconstruct signal time and form detector specific time slices ssociate time slices according to event selection scheme

28 ummary and Outlook ummary and Outlook ummary Hot topics in hadron physics by using an anti-proton beam pectrometer: hermiticity, high precision and rate capability Q & trigger: highly flexible programmable physics machine Outlook Roadmap: Technical esign Report in 2008 ata taking from 2013